Lowrance mount help

Buddy and I were fishing off his boat last weekend on barren and a storm blew up. I was rushing helpin him get everything back to the cabin and was undoing his lowrance fishfinder which I believe is the HDS 5 model with the two screw handles on each side. Me baing the dummy I am screwed the knob holding the fish finder in place all the way off and plop. It falls in the water:eek:. Of course being the right thing to do I told him I'd but him a new one. But I get online today and all I find is a pair of knobs for $40 and they don't even look like the right thing. All I need is one. Was thinking g they would be three or four bucks! Does anyone know where I can buy a set that maby aren't made by lowrance and are cheaper or where I can find the right knobs. Thanks! Drew

I saw some knobs on E-bay and they had them priced at $14.95. Down below is how they were listed. Hope it helps

Lowrance-HDS-Security-Gimbal-Knob-and-Washer-Gen-1-and-Gen-2-GK-12-000-10716-001

Haha I did the same thing. Instead of getting a new knob I just found a bolt with a wing on the end. If your buddy is up for that just got to lowes.

Alright thanks guys.